Gear-shifter.



A. c. WEBB.

GEAR SHIFIER.

APPLIOATION rILnn JULY 10, 1011.

1,035,503. I Patented Aug. 13,1912.

COLUMBIA PLANOGRAPN co.. WASHINGTON. D. cl

UNITED STATES PATENT OFFICE.

ALBERT C. WEBB, OF ST. LOUIS, MISSOURI, ASSIGNOR TO THE WEBB MOTOR FIREAPPARATUS COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF DELAWARE.

GEAR-SHIFTER.

To all whom it may concern Be it known that I, ALBERT C. Venn, a citizenofthe United States, residing at the city of St. Louis, State ofMissouri, have invented certain new and useful Improvements inGear-Shifters, of which the following is a specification.

This invention relates to attachments for automobile fire engines, andmore especially to the mechanism employed for driving the pump withwhich the engine is equipped.

It comprehends, generally, an improved operating mechanism of thecharacter specified, such mechanism including a shiftable gear which ismovable into and out of mesh with the main driving gear of the pump andis supported and operated in a particular manner through theintermediary of special parts.

A structural embodiment of the invention is illustrated in theaccompanying drawings, whereof, I

Figure 1 is a transverse sectional view of an automobile with a pumpsupported on the chassis, in conjunction with gear driving mechanism forthe pump; Fig. 2 is a similar view, showing the gear shifter; Figs. 3and 4 are, respectively, face and side views of a collar carried by theshiftable gear; and Figs. 5 and 6 are, respectively, face and side viewsof the shiftable gear.

In said drawings, B represents the pump element which is to be operatedand which may be of any suitable construction or make, and is here shownas of the double rotary type. Its body portion 1 is supported invertical brackets 2 attached to the main rails 3 of the chassis of theautomobile, and its two shafts 5 and 6 are provided upon theirprojecting front ends with inter-meshing gears 7 and 8, the latter shaftconstituting the driving shaft and carrying a large gear 9. This shaftextends forwardly beyond the other shaft and is journaled at itsterminal in a cap-like bearing 10 mounted upon the crossrail 11.

Gear 9 is driven in the present instance from a gear 12 which isslidably mounted upon the angular portion 13 of the clutch shaft 14 ofthe car, its bore or axial opening 15 having a corresponding shape, aswill be understood. Said gear 12 is supported from a horizontal rockshaft 16 by means of a depending yoke 17 which is secured to that shaftand straddles the hub IatontedAug. 13, 1912.

Serial No. 637,744.

portion 18 of the gear, the ends of the legs of said yoke being forkedand themselves straddling the laterally-offset trunnions 19 of a collar20 seated in a circumferential groove 21 formed in said hub. Collar 20is preferably constructed of counterpart semi-annular sections 22,-whosecorresponding enlarged upper and lower ends are secured together bymeans of bolts 23 passed through registering perforations formedtherein. To prevent said collar from chafing in its groove, one of thetrunnions is made hollow to receive the end of a lubricant feed pipe 24leading from a suitable source of supply.

The actuation of the shiftable gear 12 is effected by means of a lever25 mounted upon the end of shaft 16, the arrangement being such thatmovement of said lever in one direction will bring the gear into meshwith the pump drive gear 9, while reverse movement will shift said gearout of mesh, as will be apparent.

The clutch shaft 14 is adapted to be coupled with the engine shaft (notshown) through the intermediary of a clutch of any suitable type.

The operation of the mechanism is as follows: Assuming that the car isstationary and the engine is running idly, when it is desired to startthe pump, the lever 25 is moved so as to rock the shaft 16 in thedirection to cause the yoke 17 to shift the gear 12 on shaft 14 intomesh with gear 9, after which the clutch mechanism is oper ated in theusual manner to couple the shaft 14 with the engine shaft, whereby saidshaft 14 rotates with the engine shaft and drives the pump shafts 5 and6 through the medium of gears 12, 9, 8, and 7. When it is desired tostop the pump, either the clutch mechanism may be operated to uncouplethe shaft 14 from the engine shaft, or the lever 25 may be shifted, soas to rock shaft 16 in the opposite direction to cause the yoke 17 toshift the gear 12 on shaft 14 out of mesh with the gear 9.

What is claimed is:

1. The combination with a shaft; of a shiftable element mounted thereonand having its hub formed with-a circumferential groove; a collar fittedin said groove and provided with a pair of trunnions, one of which ishollow; a rocking yoke straddling said hub and collar and having theends of its legs pivo-tally connected to said trunnions, for shiftingsaid element along said shaft; and a lubricant supply pipe having thedischarge end thereof fitted in the hollow trunnion.

2. The combination, With a shaft; of a shiftable element mounted thereonand having its hub formed with a circumferential groove; a collar fittedin said groove and provided with a pair of trunnions one of which ishollow; a rock shaft; a yoke depending from said rock shaft andstraddling said hub and collar the ends of the legs of said yoke beingpivotally connected to said shaft to shift said element along thefirstnamed shaft; and a lubricant supply pipe having the discharge endthereof fitted in the hollow trunnion.

In testimony whereof I hereunto aflix my 20 signature in the presence oftwo Witnesses.

ALBERT C. WEBB.

WVitn'esses R. M. JAMES, LOTTIE M. Fox.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington. D. C.

